After installing the Win10 2004 build 19041 update (running winver shows "version 2004 (OS build 19041.388)", I've tried to upgrade a couple of installed distros I had in WSL version 1 to WSL version 2 following the instructions at https://docs.microsoft.com/en-us/win.../install-win10. All the steps in the instructions compete successfully, up to the point where I try to change the WSL version of one of the installed distros to 2 at which point I see the messages below:

Code:
PS C:\WINDOWS\system32> wsl -l -v
  NAME            STATE           VERSION
* Debian          Stopped         1
  Ubuntu-20.04    Stopped         1
PS C:\WINDOWS\system32> wsl --set-version Debian 2
Conversion in progress, this may take a few minutes...
For information on key differences with WSL 2 please visit https://aka.ms/wsl2
Please enable the Virtual Machine Platform Windows feature and ensure virtualization is enabled in the BIOS.
For information please visit https://aka.ms/wsl2-install
PS C:\WINDOWS\system32> wsl -l -v
  NAME            STATE           VERSION
* Debian          Stopped         1
  Ubuntu-20.04    Stopped         1
PS C:\WINDOWS\system32>
I have enabled the Virtual Machine Platform feature (it shows as on with a tick against it in Control Panel Windows features), Intel-vt virtualization is enabled in the BIOS, and running msinfo32 shows, at the bottom of the system summary listing:

Code:
Hyper-V - VM Monitor Mode Extensions    Yes
Hyper-V - Second Level Address Translation Extensions    Yes
Hyper-V - Virtualisation Enabled in Firmware    Yes
Hyper-V - Data Execution Protection    Yes
I also tried installing another distro with the WSL default version set to 2, but attempting to launch it shows the error:

Code:
Installing, this may take a few minutes...
WslRegisterDistribution failed with error: 0x80370102
Error: 0x80370102 The virtual machine could not be started because a required feature is not installed.

Press any key to continue...
Any suggestions on how to get around this problem? From what I've read, WSL2 gives worthwhile speed increases over WSL1, and so is worth using if I can get it to work.